Abstract
Schizophrenia is a chronic mental disorder characterized by continuous or relapsing episodes of psychosis. While previous studies have detected functional network connectivity alterations in patients with schizophrenia, and most have focused on static functional connectivity. However, brain activity is believed to change dynamically over time. Therefore, we computed dynamic functional network connectivity using the sliding window method in 38 patients with schizophrenia and 31 healthy controls. We found that patients with schizophrenia exhibited higher occurrences in the weakly and sparsely connected state (state 3) than healthy controls, positively correlated with negative symptoms. In addition, patients exhibited fewer occurrences in a strongly connected state (state 4) than healthy controls. Lastly, the dynamic functional network connectivity between the right executive-control network and the medial visual network was decreased in schizophrenia patients compared to healthy controls. Our results further prove that brain activity is dynamic, and that alterations of dynamic functional network connectivity features might be a fundamental neural mechanism in schizophrenia.
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The data that support the findings of this study are available from the corresponding author upon reasonable request.
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Funding
This work was funded by National Key R&D Program of China (2016YFC1306800), Tianjin Science and Technology Plan Projects (2017ZXMFSY00070), and Key Discipline Project for Psychiatry of Tianjin.
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Weiliang Yang designed the study, writing of the manuscript. Xuexin Xu, Chunxiang Wang and Yongying Cheng: recruitment of patients. Yan Li and Shuli Xu: processed the fMRI data, performed the analysis. Jie Li: reviewed and revised the article.
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Yang, W., Xu, X., Wang, C. et al. Alterations of dynamic functional connectivity between visual and executive-control networks in schizophrenia. Brain Imaging and Behavior 16, 1294–1302 (2022). https://doi.org/10.1007/s11682-021-00592-8
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DOI: https://doi.org/10.1007/s11682-021-00592-8